[Brachytherapy of ocular melanoma: physical and dosimetric aspects of 125I plaques].

Off-axis absorbed dose distribution of ophthalmic plaques is a useful parameter for the explanation of some observed biological effects. From a specific dosimetric software, developed in our brachytherapy department, and from our measurements around 125I eye plaque, we studied the dose distribution effects on the spread of activities inside the plaques. After analysis of experimental data, we observed also that the dose distribution in the penumbra area may be described easily with decrement lines.